ABB TPL69-A33 Series Operation Manual page 60

Cleaning method
Principle of wet cleaning
CAUTION
CAUTION
V-engines
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Operation Manual / TPL65-A32 / -A33 / -A36 + TPL69-A32 / -A33
Maintenance
Cleaning turbine blades and nozzle ring
in operation
When cleaning the turbine components during operation, use wet clean-
ing. This cleaning method has been tested and approved by ABB Turbo
Systems.
Prerequisites for wet cleaning are that the engine builder approves the
process and his instructions are followed.
During wet cleaning using droplets of water, the water does not act as a
solvent. Instead, the deposit is removed by the mechanical impact of the
drops.
Corrosion and deposits when cleaning
Damage and impairment of turbocharger parts due to salt water and
cooling water additives
Don't use salt water for cleaning, but only clean fresh water.

Components at the turbine end are not cleaned until the engine has been
started or the engine load reduced. The exhaust gas temperature must
not exceed the value specified in the respective cleaning instructions (see
section Prerequisites [➙ 59]).
Exhaust gas temperature, stabilising and drying time
Drastically reduced lifetime of component due to excessive inlet tem-
perature and varying temperature stresses in the component.
Always adhere to the respective cleaning instructions.

In the case of V-engines with several turbochargers on each engine, we
recommend parallel cleaning of both turbochargers. This cleaning process
is faster and the risk of turbocharger surging is reduced. We recommend
finding the most suitable method by performing trials.
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